
package cn.net.greenet.user.manage;

import cn.net.greenet.common.db_service.BaseDao;
import cn.net.greenet.user.operation.UserLoginAction;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.sf.json.JSONObject;

/**
 * 系统管理员登录 {“result”:”1”} 1:密码错误 2:此用户已登录 3:登录异常 4:用户不存在 5:登录成功
 *
 * @author liangdelin
 */
@WebServlet(name = "Login", urlPatterns = {"/user/login"})
public class Login extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String json = request.getParameter("json");
            JSONObject jo = JSONObject.fromObject(json);
            BaseDao baseDao = new BaseDao();
            ResultSet rs = baseDao.executeSQL("select pswd ,isOn from user where `name` = ?", new Object[]{jo.get("username")});
            if (rs.next()) {
                if (MD5Tool.GetMD5Code(jo.get("password").toString()).equals(rs.getString("pswd"))) {
//                    if (rs.getInt("isOn") == 1) {
//                        out.println("{\"result\":\"2\"}");   //用户只能使用一个用户名
//                    } else {
                        int row = baseDao.executeUpdate("Update user set last_ip = ? ,last_in = ? ,isOn = ? where name = ?", new Object[]{Util.getIpAddr(request), System.currentTimeMillis(), 1, jo.get("username")});
                        if (row == 1) {
                            UserLoginAction.insertDB(jo.get("username").toString(), Util.getIpAddr(request));  //生成用户的登录日志
                            HttpSession session = request.getSession(true);  //create session
                            session.setMaxInactiveInterval(1200*2);  //longtime 10*2 min
                            session.setAttribute("name", jo.get("username"));
                            out.println("{\"result\":\"5\"}");
                        } else {
                            out.println("{\"result\":\"3\"}");
                        }
//                    }
                } else {
                    out.println("{\"result\":\"1\"}");
                }
            } else {
                out.println("{\"result\":\"4\"}");
            }
        } catch (Exception e) {
            e.printStackTrace();
            out.println("{\"result\":\"3\"}");
        } finally {
            out.close();
        }

    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
